Gotoh® 4 In Line Bass Large GB29 reverse wind Tuning Machines These are not direct replacement tuning machines for vintage and vintage reissue Fender® basses. Although they appear similar, the footprint is not the same, so new holes are needed to install if retrofitting to a Fender® instrument. The sets come complete with bushings and mounting screws.[SKU:GB29N L4] Post Height: 1.21 in. Post Diameter: .55 in. Bushing Outer Diameter: .633 in. Bushing Inner Diameter: .565 in.